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Biology 2003 WAEC Past Questions

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36
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.
Which of the following represents the phenotypic ratio of the above genetic cross?
  • A. 1:2:1
  • B. 4:1
  • C. 3:1
  • D. 2:2
View Answer & Discuss (5) WAEC 2003
37
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.Which of the following represents the genotypes of the parents if R is for red gene and r for white gene?
  • A. RR X Rr
  • B. RR X rr
  • C. rr x rr
  • D. Rr x Rr
View Answer & Discuss (4) WAEC 2003
38
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
  • A. a blending of black and white genes
  • B. recombination of genes
  • C. loss of the epidermis
  • D. mutation in the skin cells
View Answer & Discuss WAEC 2003
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39
Sickle-cell anaemia has persisted in the human race due to
  • A. lack of proper medical care for sicklers
  • B. carriers being more resistant to malaria
  • C. mosquito vectors
  • D. wildlife intermediate hosts
View Answer & Discuss (7) WAEC 2003
40
Which of the following is not a behavioural adaptation used by social animals?
  • A. Cryptic
  • B. Mimicry
  • C. Flash
  • D. Season
View Answer & Discuss WAEC 2003
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